Loading

C# MessageBox1 program

I am a novice to C# program. When I tried to execute the following program following error message is coming. Please anybody explain.

“The type or namespace name 'Windows' does not exist in the class or namespace 'System' (are you missing an assembly reference?)”

using System;

using System.Windows.Forms;

public class MessageBox1

{

public static void Main()

{

MessageBox.Show("Hello!");

}

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

19y ago
Thank you very much for your help Mike, program is working.
Maha
0
Mike Gold19y ago
you probably just need to add a reference to system.windows.forms to your project. Right click on your project in the Solution Explorer and choose add references. Then go down the listbox until you see System.Windows.Forms and select it.

-Mike
0